president barack obama and indian prime minister nraen ra modi have agreed to strengthen economic and security ties. modi is visiting washington for the first time since taking office in may. the two leaders say they'll expand their collaboration on trade and investment. they also deepened their cooperation on renewable energy technology. they both are agreed to step up military cooperation, including expert exchanges and joint exercises. and they've discussed enhancing u.s. technology cooperation to help support india's navy. >> we are affirmed that as two of the world's largest democracies, it is critical for us to continue to deepen and broaden the existing framework of partnership and friendship that already exists. >> translator: i am convinced that india and american economic relations will develop rapidly in the future. >> both expressed their concern about rising tensions over territorial disputes in the south china sea. leaders of some southeast asian countries say they're worried about china's increased maritime activity in the region. obama and modi are calling on all parti